- Luca Giuggioli spent half of his sabbatical with us (2015–2016)
- Thierry Fraichard spent his sabbatical with us (2014–2015)
- Peter Stone spent some of his sabbatical year with us (2009–2010).
- Jose Antonio Iglesias visited with us for a couple of months, in the summer of 2007. Our joint work resulted in a journal article about a new method for sequence learning and classification.
- Adrian Perreau de Pinninck visited with us in the Summer of 2007, to work on overhearing as a method for reducing communication costs in organizations.